Sona main and the request for a small power boost

So what with her being my main character, i have been playing sona quite a bit and while she is in a ok place over all, i still feel like she is missing just a little bit of something. Rather then get into the argument about "Is she too strong?" "No, she just hits hard when you build her like a mage"etc... I instead would like to ask for a power boost on her last basic ability, that being her movement speed skill. At this point i don't even really care in what regard the ability gets stronger, just that it DOES get stronger.

a 13% movement speed bonus for 1.5 seconds, degrading into a 10% bonus for the remaining 1.5 seconds, is a really really weak skill to have in her kit. Even when you look at its power when applied to your whole team that is still only a 10% movement boost to your team for 1.5 seconds. To make matters worse the skill ranks up poorly, with a wooping 1% boost per rank (and 2% per rank in your ultimate). The skill doesn't even have a good AP ratio with an "amazing" 7.5% AP ratio. Most skills run something between a 20-80% ratio with AP. Add to this the powercord for the spell offers a rather lack luster slow (not even a stun, just a slow) at 40% +4% AP ratio, that lasts for all of 2 seconds.

Basic long story short: Sona is still way to slow and squishy to have such a unreliable escape tool in her kit. As it stands basically any champion with a gap closer is going to be able to catch you even if you are spamming your movement speed buff whenever its off cooldown. Even if you level the skill you only get a 1% bonus per rank, the cost doesn't change nor does the cooldown. With games ending earlier, it's becoming harder and harder to get Sona up to a high enough level and/or AP that her movement speed bonus does enough to justify taking up an ability slot.